Abstract : Maintenance costs for life cycle cost estimates for new construction are currently estimated from the Maintenance Resource Prediction Model (MRPM) databases developed by the U.S. Army Construction Engineering Research Laboratories. These databases were developed more than 10 years ago; many new materials have entered the marketplace and others have disappeared over that period of time. Data to update the architectural systems of the MRPM database were developed. The data updates tasks and materials for the MRPM database's roofing systems, exterior closure systems, and interior construction systems. In addition to the material and task update, cost data was developed for the new and modified systems. Several tasks currently in the MRPM database were identified for deletion. These deletions are necessary because the materials for the tasks are either no longer commercially available or contain hazardous materials and are being phased out of the U.S. market. The existing MRPM database is updated using this new data.